Flexible Strategy for Syntheses of Spirooxindoles using Palladium-Catalyzed Carbosilylation and Sakurai-Type Cyclization
作者:Sudhir M. Hande、Motoyuki Nakajima、Haruhi Kamisaki、Chihiro Tsukano、Yoshiji Takemoto
DOI:10.1021/ol2003447
日期:2011.4.1
The intramolecular carbosilylation of N-[2-(1,3-butenyl)aryl]carbamoyl chloride has been investigated. The reaction with hexamethyldisilane proceeds smoothly in the presence of a catalytic amount of [Pd(η3-allyl)Cl]2 to give oxindoles with an allylsilane functional group in good yield. The subsequent subjection of the products to a Sakurai-type reaction provides more advanced tricyclic spirooxindoles
已经研究了N- [2-(1,3-丁烯基)芳基]氨基甲酰氯的分子内碳硅烷化。六甲基二硅烷与反应平稳地进行在[钯(η催化量的存在3 -烯丙基)CL] 2,得到的羟吲哚与以良好的收率烯丙基硅烷官能团。产物随后进行樱井型反应,通过控制三个连续的立体异构中心的立体化学,从而提供了更高级的三环螺硫辛醇。